[issue21362] concurrent.futures does not validate that max_workers is proper

[Claudiu.Popa]

Changes by Claudiu.Popa <pcmanticore at gmail.com>:


Added file: http://bugs.python.org/file35058/issue21362_1.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21362>
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